Information valid for Kr-84 unless otherwise noted
[ATOM]

Krypton

 [ATOM]

Basic Information


Symbol: Kr
Atomic Number: 36
Mass: 83.8
Melting Point: -157.2
Boiling Point: -153.4
Number of Protons/Electrons: 36
Number of Neutrons: 48
Classification: Noble Gas
Crystal Structure: Cubic
Density: 3.74
Color: colorless gas

Atomic Structure

[Bohr Model of Krypton]  
Number of Energy Levels: 4

    First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 8

Isotopes

Isotope Half Life
Kr-78Stable
Kr-791.45 days
Kr-80Stable
Kr-81210000 years
Kr-82Stable
Kr-83Stable
Kr-83m1.86 hours
Kr-84Stable
Kr-8510.73 years
Kr-85m4.48 hours
Kr-86Stable
Kr-871.27 hours
Kr-882.84 hours
Kr-893.15 minutes
Kr-9032.3 seconds

Facts


Date of Discovery: 1898
Discoverer: Sir William Ramsey
Name Origin: From the Greek word kryptos (hidden)
Uses: Lighting
Obtained From: production of liquid air

Related Links

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